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Title: Seed germination characteristics of Chrysothamnus nauseosus ssp. viridulus (Astereae, Asteraceae)

Abstract

Rubber rabbitbrush (Chrysothamnus nauseosus (Pallas) Britt. ssp. viridulus) may prove to be a source of high-quality cis-isoprene rubber, but its establishment is limited by a lack of information on seed germination. Consequently, seeds were germinated at alternating temperatures (5-15, 5-25, 15-25, and 20-30 C) in light and dark as well as constant temperatures (15-40 C with 5-C increments) to determine temperature response. Seeds were also germinated in solutions of polyethylene glycol 6000, salinity regimes at all the above-mentioned temperatures to determine salinity and temperature interaction. The hormones GA/sub 3/ and kinetin were used to study their effect on overcoming salt- and temperature-induced germination inhibition. Seeds of C. nauseosus ssp. viridulus were very sensitive to low temperature. Best germination was achieved at 25 and 30 C, but these seeds also germinated at a higher temperature (35 C). The seeds of rabbit brush germinated at both constant and alternating temperatures. Light appears to play little or no role in controlling germination of the seeds of rubber rabbitbrush. However, seeds of rabbitbrush were sensitive to salinity, and seed germination was progressively inhibited by increase in salt concentration, although a few seeds still germinated at the highest saline level. Progressively higher concentrations of polyethylenemore » glycol also progressively inhibited germination. Suppression of seed germination induced by high salt concentrations and high temperatures can be partially alleviated by the application of either GA/sub 3/ or kinetin. 34 references, 5 figures, 3 tables.« less

Authors:
; ; ;
Publication Date:
Research Org.:
Univ. of Karachi (Pakistan)
OSTI Identifier:
5025521
Resource Type:
Journal Article
Journal Name:
Great Basin Nat.; (United States)
Additional Journal Information:
Journal Volume: 47:2
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; HORMONES; BIOLOGICAL FUNCTIONS; NATURAL RUBBER; YIELDS; SEEDS; GERMINATION; TEMPERATURE EFFECTS; EXPERIMENTAL DATA; INHIBITION; SALINITY; SHRUBS; VISIBLE RADIATION; DATA; ELASTOMERS; ELECTROMAGNETIC RADIATION; FUNCTIONS; INFORMATION; NUMERICAL DATA; ORGANIC COMPOUNDS; ORGANIC POLYMERS; PLANTS; POLYMERS; RADIATIONS; RUBBERS; 140504* - Solar Energy Conversion- Biomass Production & Conversion- (-1989)

Citation Formats

Khan, M A, Sankhla, N, Weber, D J, and McArthur, E D. Seed germination characteristics of Chrysothamnus nauseosus ssp. viridulus (Astereae, Asteraceae). United States: N. p., 1987. Web.
Khan, M A, Sankhla, N, Weber, D J, & McArthur, E D. Seed germination characteristics of Chrysothamnus nauseosus ssp. viridulus (Astereae, Asteraceae). United States.
Khan, M A, Sankhla, N, Weber, D J, and McArthur, E D. 1987. "Seed germination characteristics of Chrysothamnus nauseosus ssp. viridulus (Astereae, Asteraceae)". United States.
@article{osti_5025521,
title = {Seed germination characteristics of Chrysothamnus nauseosus ssp. viridulus (Astereae, Asteraceae)},
author = {Khan, M A and Sankhla, N and Weber, D J and McArthur, E D},
abstractNote = {Rubber rabbitbrush (Chrysothamnus nauseosus (Pallas) Britt. ssp. viridulus) may prove to be a source of high-quality cis-isoprene rubber, but its establishment is limited by a lack of information on seed germination. Consequently, seeds were germinated at alternating temperatures (5-15, 5-25, 15-25, and 20-30 C) in light and dark as well as constant temperatures (15-40 C with 5-C increments) to determine temperature response. Seeds were also germinated in solutions of polyethylene glycol 6000, salinity regimes at all the above-mentioned temperatures to determine salinity and temperature interaction. The hormones GA/sub 3/ and kinetin were used to study their effect on overcoming salt- and temperature-induced germination inhibition. Seeds of C. nauseosus ssp. viridulus were very sensitive to low temperature. Best germination was achieved at 25 and 30 C, but these seeds also germinated at a higher temperature (35 C). The seeds of rabbit brush germinated at both constant and alternating temperatures. Light appears to play little or no role in controlling germination of the seeds of rubber rabbitbrush. However, seeds of rabbitbrush were sensitive to salinity, and seed germination was progressively inhibited by increase in salt concentration, although a few seeds still germinated at the highest saline level. Progressively higher concentrations of polyethylene glycol also progressively inhibited germination. Suppression of seed germination induced by high salt concentrations and high temperatures can be partially alleviated by the application of either GA/sub 3/ or kinetin. 34 references, 5 figures, 3 tables.},
doi = {},
url = {https://www.osti.gov/biblio/5025521}, journal = {Great Basin Nat.; (United States)},
number = ,
volume = 47:2,
place = {United States},
year = {Thu Apr 30 00:00:00 EDT 1987},
month = {Thu Apr 30 00:00:00 EDT 1987}
}